Grinding apparatus



F. M. FURBER.

GRINDING APPARATUS.

APPLICATION FILED ocnzs, 1917.

1,364,876 Patented Jan 11, 1921 UNITED. STATES PATENT OFFICE.

FREDERICK M. I EURBER, 0F REVERE, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO UNITED SHOE MACHINERY CORPORATION, OF PATER- SON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

GRINDING APPARATUS.

Specification of Letters Patent. Patented Jan. 11, 1921.

Application filed October 29, 1917. Serial No. 199,048.

To all whom it may concern:

Be it known that I, FREDERICK M. FUR- nnn, a citizen of the United States, residing at Revere, in the county of Suffolk and State of Massachusetts, have invented certain Improvements in Grinding Apparatus, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to grinding apparatus and particularly to those in which an air current is employed for removing the particles produced in grinding.

WVith machines of the above-mentioned character, and especially when a number are used together in a factory, a considerable economy may be effected by cutting off the air current from any'machine upon which the grinding operation is not being performed. To this end I have devised a novel arrangement for maintaining the air conduit normally close'd,'it being opened only when grinding is being performed. In the organization illustrated I have mounted the grinding wheel upon a support, the movement of which controlsthe air current.

A further economy may be-attained by causing the grinding wheel to rotate only when its use is desired, and with this in View I cause the movement of the support to control the rotation'of the wheel. This, in the present instance, is accomplished by providing driving elements for the wheel mounted upon the support and a relatively fixed part, they being operatively connected upon movement of the support. I

'One of the various embodiments of the invention is shown in the accompanying" Figure 1 being a partial front elevation of? a machine with which my improved grind-- ing apparatus may be employed, showing the latter mounted thereon, and

Fig. 2 is a broken side elevation of the another. Mounted betweenthe standards is agrinding wheel support, this being preferably furnished by an air conduit section 16 pivoted at 18 near the top of the standards 14. At the forward end of the conduit section 16 is a double hood or enlargement 20 across the vertical open mouths of which hood-portions, in bearings 22, 22, is journaled a shaft 24. At the outer extremities of'the shaft are grinding wheels 26,26, there being one located in each of the hoods. The grinding wheels are rotated by gearing which preferably consists of a pulley 28 secured tothe shaft 24 between the hoods and connected by a belt B to a pulley 32 fast upon one of the shafts of the edge trimming machine. A guard 33 fixed to the frame of the machine may extend over the belt and pulleys to prevent contact therewith.

At the opposite or rear end of the conduit section 16 is a face 34: curved outwardly about a center situated at the axis of the pivotal support of thesection. This face moves in close proximity to a correspondingly curved concave face 36 formed upon theadjacent end of a fixed conduit section 38 carried by an arm 40 projecting from the bracket 12. The outer end of the section 38 is fitted to receive abranch pipe 42 of the suction system through which the particles spring 44 extending from the rear end of" the section to the frame 10. At thistime the opening in the conduit section 38 is closed by a solid upward extension 46 of the face 34 curved upon the same radius, so that no air can be drawn through this portion of the system; The belt also hangs loosely, as is shown in dotted lines at b, so that the grinding wheelshaft does not rotate. Therefore the power necessary to create suction through the conduit and to drive the grinding wheels is saved and the wear upon the shaft 24 and its bearings is relieved. If desired, a contact surface 47 may be provided on the guard 33 against which the pulley 28 bears in the upward movement of the section 16, limiting its travel and promptly stopping the rotation of the grinding wheels.

When the operator desires to grind a cutter, he drawsdown the forward end of the conduit section 16, causing the lower curved surface of a projection 48 depending from the under side of the section to ride over the upper curved surface of a projection 50 situated at one side of a latch 52. This latch is pivoted upon the bracket and is forced upwardly by a spring 54 situated in a recess in its under side and contacting with the top of the bracket. The extremity 56 of the latch striking the bracket limits the upward movement of the projection 50. When the projection 48 has depressed and traveled over the latch until vertical faces 58 of the projections 48 and 50 have passed one another, the latch is forced up by the spring and the contact of the faces 58 locks the conduit section in the depressed position shown in full lines in Fig. 2. Now the extension 46 is moved up to open the conduit section 38, the passages through the two sect1ons being in alinement so that the suction current flows therethrough. At the same time the belt B is tightened and rotation is communicated from the pulley 32 to the pulley 28. driving the grinding wheels.

WVhen the operator has finished the work he depresses a forward extension 60 of the latch 52 until the latch projection 50 passes below the conduit projection 48. The latter is released and the spring 44 draws the section 16 to its raised position, closing the passage of the conduit and releasing the tension on the belt, so that the suction effect and the drive of the grinding wheel cease.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a grinding apparatus, a grinding wheel, a movable support therefor, a conduit for removing the particles produced in grinding, and means governed by the movement of the support for controlling the opening of the conduit.

2. In a grinding apparatus, a grinding wheel, a movable support therefor, a conduit section for removing the particles produced in grinding and carried by the movable support, and means governed by the movement of the conduit section for controlling the draft.

3. In a grinding apparatus, a grinding wheel, a movable support therefor, and a conduit for removing the particles produced in grinding, said conduit including a portion movable with the support and a relatively fixed portion, the movable portion having means for closing the opening in the fixed portion.

4. In a grinding apparatus, a grinding wheel, a movable support therefor, a conduit for removing the particles produced in grinding, means governed by the movement of the support tending to maintain normal closure of the conduit, and means for temporarlly retaining the conduit open.

5. In a grinding apparatus, a grinding wheel, a movable support therefor, a conduit for removing the particles produced 1n grinding, said conduit including a portion movable with the support and a relatively fixed portion, the movable portion having means for closing the opening in the fixed portion, a spring'cooperating with the support to hold the conduit normally closed, and a latch for holding the support with the conduit open.

6. In a grinding apparatus, a grinding wheel, a movable support therefor, means for rotating the grinding wheel upon the support, a conduit for removing the particles produced in grinding, and means governed by the movement of the support for controlling the opening of the conduit and the rotation of the grinding wheel.

7. In a grinding apparatus, a grinding wheel, a movable support therefor, means for rotating the grinding wheel upon the support, and a conduit for removing the particles produced in grinding, said conduit including a portion movable with the support and a relatively fixed portion, there being elements of the rotating means bearing the same movable and fixed relations as the portions of the conduit.

8. In a grinding apparatus, a grinding wheel, a movable support therefor, means for rotating the grinding wheel upon the support, a conduit for removing the par ticles produced in grinding, means governed by the movement of the support tending to maintain normal closure of the conduit and non-rotation of the wheel, and means for temporarily retaining the conduit open and the wheel in rotation.

9. The combination with a frame, of a conduit section fixed to the frame, a conduit section movable upon the frame and having an opening which may be brought into alinement with the opening in the fixed section, and a grinding wheel rotatable upon the pivoted section.

10. The combination with a frame, of a conduit section fixed to the frame, a conduit section pivoted upon the frame and having an opening which may be brought into alinement with the opening in the fixed section and also having a closure for the opening of said fixed section, and a grinding wheel rotatable upon the pivoted section.

11. The combination with a frame, of a conduit section fixed to the frame, a conduit section pivoted upon the frame and having an opening which may be brought into alinement with the opening in the fixed section, a latch mounted upon the frame and cooperating with the pivoted section to maintain said alinement, and a grinding wheel rotatable upon the pivoted section.

12. The combination with a frame, of a conduit section fixed to the frame, a conduit section pivoted upon the frame, the sections havlng communicatlng openings situated in cooperating faces curved about the pivotal axis of the movable section, and a grinding wheel rotatable upon the pivoted section.

13. The combination with a frame, of a conduit section fixed to the frame, a conduit section pivoted upon the frame and having an opening which may be brought into alinement with the opening in the fixed section, a grinding wheel rotatable upon the pivoted section, and gearing for rotating the grinding wheel including an element mounted upon the frame.

14:. The combination with a frame, of a conduit section fixed to the frame, a conduit section movable upon the frame and having an opening which may be brought into alinement with the opening in the fixed section, a latch mounted upon the frame and cooperating with the movable section to maintain said alinement, a grinding wheel rotatable upon the movable section, and a belt tensioned to rotate the grindin wheel when the movable section is latche in alined position.

I 15. In a grinding apparatus, a grinding wheel, a movable support therefor, means for rotating the grinding wheel upon the support, a conduit for removing the particles produced in grinding, said conduit including a portion movable with the support and a relatively fixed portion, there being tions of the conduit, and a member carried with the fixed means and contacting with the movable rotating means in its movement to stop its rotation.

16. The combination with a frame, of a conduit section fixed tothe frame, a conduit section pivoted upon the frame and having an opening which may be brought into alinement with the opening in the fixed section, a grinding wheel rotatable about the pivoted section, gearing for rotating thegrinding wheel including an element mounted upon the frame, and a member carried by the frame and contacting in the movement of the conduit section with an element rotating with the grinding wheel.

17. 'lhe combination with a frame, of a conduit section fixed to the frame, a conduit section movable upon the frame and having an opening which may be brought into alinement with the opening in the fixed section, a grinding wheel rotatable upon. the movable section, a belt tensioned to ro- .tate the grinding wheel when the movable FREDERICK M. FURBER. 

